Prince Sadruddin Aga Khan, 70, a philanthropist and environmentalist who served as UN High Commissioner for Refugees and was the uncle of Prince Karim Aga Khan IV, the current leader of the 20 million Shiite Ismaili Muslims, died Monday in Boston.
He died in a hospital after a short illness, his office in Geneva announced. No cause of death was given.
For nearly 40 years, Prince Sadruddin was closely associated with the work of the United Nations, specializing in disaster relief work.

Prince Sadruddin Aga Khan, 70, a philanthropist and environmentalist who served as UN High Commissioner for Refugees and was the uncle of Prince Karim Aga Khan IV, the current leader of the 20 million Shiite Ismaili Muslims, died Monday in Boston.

He died in a hospital after a short illness, his office in Geneva announced. No cause of death was given.

For nearly 40 years, Prince Sadruddin was closely associated with the work of the United Nations, specializing in disaster relief work.